MantisBT - CMake
For Example:
###############################################
MACRO (ADD_COMPILER_FLAGS TargetProject Flags)
SET_PROPERTY(TARGET ${TargetProject}
APPEND PROPERTY
COMPILE_FLAGS ${Flags})
ENDMACRO (ADD_COMPILER_FLAGS)
SET (SRC_FILES
Main.cpp
StdAfx.cpp
StdAfx.h)
ADD_EXECUTABLE(CMakeBugPrj WIN32 ${SRC_FILES})
ADD_COMPILER_FLAGS(CMakeBugPrj /wd4244)
ADD_COMPILER_FLAGS(CMakeBugPrj /wd4311)
ADD_COMPILER_FLAGS(CMakeBugPrj /wd4312)
###############################################
One would expect that the command line being passed to cl.exe would get /wd"4244" /wd"4311" /wd"4312", but instead it is getting /wd"4244" /wd"/wd4311" /wd"/wd4312".
To get around this issue, I was previously quoting the macro ${Flags} as " ${Flags}", but I came upon another issue that is now somewhat blocking me. I have another macro that also appends to the compiler flags list, but this time a semicolon is getting appended to the flag. This is causing the compiler to barf.
cmProperty::Append - this function will append a semicolon if there is more than one option present.
cmSystemTools::ParseWindowsCommandLine - this function will jam all the arguments into one argument.
For example:
Project compile flags are set to "/Yu"StdAfx.h" /Yc"StdAfx.pch";/wd4244;/wd4311;/wd4312"
The project level compiler flags are separating the individual flags with a semicolon. When the generator begins generating the final output, it will take the project level compile flags and try to split out the arguments based on parsing the windows command line. According the the link, this is space separated, which means that the example above is actually two command line arguments.
I guess my recommendation, if I have one, is to determine a better solution for appending multiple compile flags. I would suggest a set of strings.
| related to | 0012342 | closed | Alex Neundorf | Using set_property(...APPEND) for COMPILE_FLAGS result in semicolons in the build command line |
CMakeBug.zip (1,266) 2011-07-10 22:30https://public.kitware.com/Bug/file/3968/CMakeBug.zip